+typedef struct {
+ GtkPrinter *printer;
+ GtkPrinterOptionSet *set;
+} _OutputFormatChangedData;
+
+static void
+set_printer_format_from_option_set (GtkPrinter *printer,
+ GtkPrinterOptionSet *set)
+{
+ GtkPrinterOption *format_option;
+ const gchar *value;
+ gint i;
+
+ format_option = gtk_printer_option_set_lookup (set, "output-file-format");
+ if (format_option && format_option->value)
+ {
+ value = format_option->value;
+ if (value)
+ {
+ for (i = 0; i < N_FORMATS; ++i)
+ if (strcmp (value, formats[i]) == 0)
+ break;
+
+ g_assert (i < N_FORMATS);
+
+ switch (i)
+ {
+ case FORMAT_PDF:
+ gtk_printer_set_accepts_pdf (printer, TRUE);
+ gtk_printer_set_accepts_ps (printer, FALSE);
+ break;
+ case FORMAT_PS:
+ gtk_printer_set_accepts_pdf (printer, FALSE);
+ gtk_printer_set_accepts_ps (printer, TRUE);
+ break;
+ case FORMAT_SVG:
+ default:
+ gtk_printer_set_accepts_pdf (printer, FALSE);
+ gtk_printer_set_accepts_ps (printer, FALSE);
+ break;
+ }
+ }
+ }
+}
+
+static void
+file_printer_output_file_format_changed (GtkPrinterOption *format_option,
+ gpointer user_data)
+{
+ GtkPrinterOption *uri_option;
+ gchar *base = NULL;
+ _OutputFormatChangedData *data = (_OutputFormatChangedData *) user_data;
+
+ if (! format_option->value)
+ return;
+
+ uri_option = gtk_printer_option_set_lookup (data->set,
+ "gtk-main-page-custom-input");
+
+ if (uri_option && uri_option->value)
+ {
+ const gchar *uri = uri_option->value;
+ const gchar *dot = strrchr (uri, '.');
+
+ if (dot)
+ {
+ gint i;
+
+ /* check if the file extension matches one of the known ones */
+ for (i = 0; i < N_FORMATS; i++)
+ if (strcmp (dot + 1, formats[i]) == 0)
+ break;
+
+ if (i < N_FORMATS && strcmp (formats[i], format_option->value))
+ {
+ /* the file extension is known but doesn't match the
+ * selected one, strip it away
+ */
+ base = g_strndup (uri, dot - uri);
+ }
+ }
+ else
+ {
+ /* there's no file extension */
+ base = g_strdup (uri);
+ }
+ }
+
+ if (base)
+ {
+ gchar *tmp = g_strdup_printf ("%s.%s", base, format_option->value);
+
+ gtk_printer_option_set (uri_option, tmp);
+ g_free (tmp);
+ g_free (base);
+ }
+
+ set_printer_format_from_option_set (data->printer, data->set);
+}
+